.content {
    height: 100%;
    overflow-y: auto;
    position: relative;
}
.content span {
    color: #888;
    font-size: large;
    display: inline-block;
    margin-bottom: 10px;
}
.canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}
.base {
    height: 500px;
    margin-bottom: 20px;
}
.compare {
    height: 500px;
    display: flex;
}
.compare div {
    flex: 1;
}
.compare > div:nth-child(1) {
    margin-right: 10px;
    display: flex;
    flex-direction: column;
}
.compare > div:nth-child(2) {
    margin-left: 10px;
    display: flex;
    flex-direction: column;
}
